The QD145, QD200 and QR12 series of optical encoders have 28 AWG conductors in the standard flying lead cable.

This gauge of cable is excellent for tight bends and fitting in applications where space is a premium. The conductors can easily handle the 250 mA max current requirement of the encoder.

A smaller gauge conductor means that there will be a limit to the length of the cable. This is due to the DC resistive loss in the conductor that causes a slight voltage drop. The longer the cable, the greater the voltage drop.